JP2013236340A5

JP2013236340A5 -

Info

Publication number: JP2013236340A5
Application number: JP2012108844A
Authority: JP
Filing date: 2012-05-10
Publication date: 2014-12-18

Description

本発明の無線通信システムは、それぞれがセルを形成する複数の無線基地局装置と、前記各無線基地局装置に対して無線リンクを介して接続するユーザ端末とを備えた無線通信システムであって、前記無線通信システムは、前記ユーザ端末に対して前記複数の無線基地局装置が送信ポイントとなってＣｏＭＰ送信し、特定セルの無線基地局装置から物理下りリンク制御チャネルを送信すると共に、ＣｏＭＰ送信する無線基地局装置から物理下りリンク共有データチャネルを送信する伝送モードをサポートし、前記特定セルの無線基地局装置は、ＣｏＭＰ送信において、物理下りリンク制御チャネルを特定セルから送信する場合、送信ポイントとなるセルを示すインデックスがビットデータにマッピングされているテーブルに基づいて、物理下りリンク制御チャネルに前記インデックスを組み込んだ下りリンク制御情報を生成する生成部と、前記生成した下りリンク制御情報を含んだ各セルの物理下りリンク制御チャネルを前記特定セルから送信する送信部と、を具備し、前記ユーザ端末は、前記複数の無線基地局装置が協調マルチポイント送信するＣｏＭＰ送信において、物理下りリンク制御チャネルが特定セルから送信される場合、前記特定セルの無線基地局装置から物理下りリンク制御チャネルを受信すると共に、協調マルチポイント送信する無線基地局装置から物理下りリンク共有データチャネルを受信する受信部と、受信した各セルの物理下りリンク制御チャネルに含まれた下りリンク制御情報と、あらかじめ準備されたテーブルを用いて送信ポイントを特定する判定部と、を具備したことを特徴とする。 A radio communication system according to the present invention is a radio communication system including a plurality of radio base station apparatuses each forming a cell and a user terminal connected to each radio base station apparatus via a radio link. In the radio communication system, the plurality of radio base station apparatuses serve as transmission points for CoMP transmission to the user terminal, and a physical downlink control channel is transmitted from the radio base station apparatus of a specific cell, and CoMP transmission is performed. Support a transmission mode in which a physical downlink shared data channel is transmitted from a radio base station apparatus that performs transmission of a physical downlink control channel from a specific cell in CoMP transmission. Based on the table in which the index indicating the cell to be mapped to the bit data, A generation unit that generates downlink control information in which the index is incorporated into a link control channel; and a transmission unit that transmits a physical downlink control channel of each cell including the generated downlink control information from the specific cell. In the CoMP transmission in which the plurality of radio base station apparatuses perform coordinated multipoint transmission, when the physical downlink control channel is transmitted from a specific cell, the user terminal performs physical downlink from the radio base station apparatus of the specific cell. A receiving unit that receives a link control channel and receives a physical downlink shared data channel from a radio base station device that performs coordinated multipoint transmission; and downlink control information included in the received physical downlink control channel of each cell; A determination unit that identifies a transmission point using a table prepared in advance; Characterized by comprising a.

本発明の無線基地局装置は、ユーザ端末が無線リンクを介して接続する無線基地局装置であって、前記ユーザ端末に対して他の無線基地局装置と共に送信ポイントとなって協調マルチポイント送信するＣｏＭＰ送信をスケジューリングするスケジューラと、ＣｏＭＰ送信において、物理下りリンク制御チャネルを特定セルから送信する場合、送信ポイントとなるセルを示すインデックスが、ビットデータにマッピングされているテーブルに基づいて、物理下りリンク制御チャネルに前記インデックスを組み込んだ下りリンク制御情報を生成する生成部と、前記生成した下りリンク制御情報を含んだデータ信号を復調するために必要な制御情報を前記特定セルから送信する送信部と、を具備したことを特徴とする。 The radio base station apparatus of the present invention is a radio base station apparatus to which a user terminal connects via a radio link, and performs coordinated multipoint transmission to the user terminal as a transmission point together with other radio base station apparatuses. A scheduler that schedules CoMP transmission and, in CoMP transmission, when a physical downlink control channel is transmitted from a specific cell, an index indicating a cell that is a transmission point is based on a table that is mapped to bit data, based on a physical downlink A generation unit that generates downlink control information in which the index is incorporated into a control channel; and a transmission unit that transmits control information necessary for demodulating a data signal including the generated downlink control information from the specific cell; It is characterized by comprising.

本発明のユーザ端末は、それぞれがセルを形成する複数の無線基地局装置に対して無線リンクを介して接続するユーザ端末であって、前記複数の無線基地局装置が協調マルチポイント送信するＣｏＭＰ送信において、物理下りリンク制御チャネルが特定セルから送信される場合、前記特定セルの無線基地局装置から物理下りリンク制御チャネルを受信すると共に、協調マルチポイント送信する無線基地局装置から物理下りリンク共有データチャネルを受信する受信部と、受信した各セルの物理下りリンク制御チャネルに含まれた下りリンク制御情報と、あらかじめ準備されたテーブルを用いて送信ポイントを特定する判定部と、を備えることを特徴とする。 A user terminal according to the present invention is a user terminal that is connected to a plurality of radio base station apparatuses each forming a cell via a radio link, and CoMP transmission in which the plurality of radio base station apparatuses perform coordinated multipoint transmission In this case, when the physical downlink control channel is transmitted from the specific cell, the physical downlink shared data is received from the radio base station apparatus that receives the physical downlink control channel from the radio base station apparatus of the specific cell and performs coordinated multipoint transmission. A reception unit that receives the channel, downlink control information included in the physical downlink control channel of each received cell, and a determination unit that identifies a transmission point using a table prepared in advance. And

本発明の通信制御方法は、それぞれがセルを形成する複数の無線基地局装置と、前記各無線基地局装置に対して無線リンクを介して接続するユーザ端末とを備えた無線通信システムにおける通信制御方法であって、前記複数の無線基地局装置が協調マルチポイント送信するＣｏＭＰ送信において、物理下りリンク制御チャネルが特定セルから送信される場合、前記特定セルの無線基地局装置から物理下りリンク制御チャネルを受信すると共に、協調マルチポイント送信する無線基地局装置から物理下りリンク共有データチャネルを受信し、受信した各セルの物理下りリンク制御チャネルに含まれた下りリンク制御情報と、あらかじめ準備されたテーブルを用いて送信ポイントを特定することを特徴とする。 The communication control method of the present invention is a communication control in a radio communication system comprising a plurality of radio base station apparatuses each forming a cell and a user terminal connected to each radio base station apparatus via a radio link. In the CoMP transmission in which the plurality of radio base station apparatuses perform coordinated multipoint transmission, when a physical downlink control channel is transmitted from a specific cell, a physical downlink control channel is transmitted from the radio base station apparatus of the specific cell. And a physical downlink shared data channel from a radio base station apparatus that performs coordinated multipoint transmission, downlink control information included in the physical downlink control channel of each received cell, and a table prepared in advance The transmission point is specified using the.

Claims

Each of which is a user terminal connected via a radio link to a plurality of radio base station apparatuses forming a cell,
In CoMP transmission in which the plurality of radio base station apparatuses perform coordinated multipoint transmission, when a physical downlink control channel is transmitted from a specific cell, the physical downlink control channel is received from the radio base station apparatus of the specific cell, A receiving unit that receives a physical downlink shared data channel from a radio base station device that performs cooperative multipoint transmission;
A user terminal comprising: downlink control information included in a received physical downlink control channel of each cell; and a determination unit that identifies a transmission point using a table prepared in advance.

The user terminal according to claim 1, wherein an index indicating a cell serving as the transmission point is set in the table by higher layer signaling.

The table is characterized in that an index indicating each coordinated cell serving as a transmission point in CoMP transmission and a CoMP set index indicating each combination of a plurality of cells jointly transmitted in CoMP transmission are mapped to bit data. The user terminal according to claim 1.

The user terminal according to claim 1, wherein a carrier indicator field in which cell identification information of a physical downlink control channel is described is defined in downlink control information of the physical downlink control channel.

The user according to claim 1, wherein the table is limited to CoMP sets mapped to bit data so as not to include a CoMP set including a combination of cells whose communication quality does not satisfy a quality condition. Terminal.

The table is characterized in that a cooperative cell mapped to bit data or a CoMP set including the cooperative cell is limited so that all or part of the cooperative cell whose communication quality does not satisfy the quality condition is not included. The user terminal according to claim 1.

When the bit size of the downlink control information of the physical downlink control channels of a plurality of cells scheduled in one subframe is different from each other, the table is mapped to bit data so that all or part of the coordinated cells are not included. The user terminal according to claim 1, wherein cooperative cells to be operated are limited.

A radio base station apparatus to which a user terminal connects via a radio link,
A scheduler that schedules CoMP transmission that performs coordinated multipoint transmission to the user terminal as a transmission point together with other radio base station devices;
In CoMP transmission, when a physical downlink control channel is transmitted from a specific cell, the index indicating the cell serving as a transmission point is incorporated into the physical downlink control channel based on a table mapped to bit data. A generator for generating downlink control information;
A radio base station apparatus comprising: a transmission unit that transmits control information necessary for demodulating a data signal including the generated downlink control information from the specific cell.

A radio communication system comprising a plurality of radio base station devices each forming a cell and a user terminal connected to each radio base station device via a radio link,
The wireless communication system includes:
The plurality of radio base station apparatuses serve as transmission points for the user terminal, perform CoMP transmission, transmit a physical downlink control channel from the radio base station apparatus of a specific cell, and perform physical transmission from the radio base station apparatus that performs CoMP transmission. Support transmission mode to transmit downlink shared data channel,
The radio base station apparatus of the specific cell is
In CoMP transmission, when transmitting a physical downlink control channel from a specific cell, a downlink in which the index is incorporated into the physical downlink control channel based on a table in which an index indicating a cell serving as a transmission point is mapped to bit data. A generation unit for generating link control information;
A transmission unit that transmits the physical downlink control channel of each cell including the generated downlink control information from the specific cell, and
The user terminal is
In CoMP transmission in which the plurality of radio base station apparatuses perform coordinated multipoint transmission, when a physical downlink control channel is transmitted from a specific cell, the physical downlink control channel is received from the radio base station apparatus of the specific cell, A receiving unit that receives a physical downlink shared data channel from a radio base station device that performs cooperative multipoint transmission;
A wireless communication system comprising: downlink control information included in a received physical downlink control channel of each cell; and a determination unit that identifies a transmission point using a table prepared in advance.

A communication control method in a radio communication system comprising a plurality of radio base station devices each forming a cell and a user terminal connected to each radio base station device via a radio link,
In CoMP transmission, wherein the plurality of radio base station apparatus transmits coordinated multi-point, if the physical downlink control channel is transmitted from a particular cell, receiving a radio base station apparatus or al physics downlink control channel of the particular cell while, receives the physical downlink shared data channel from the coordinated multiple point transmission unsubstituted linear base station apparatus you,
A downlink control information included in the physical downlink control channel of each cell received, the communication control method characterized by specifying a transmission point by using a table which is prepared in advance.